DRC and Maya - you each have a PM with a download link.
DRC - yeah, the form, which doesn't need to be used by the way, is very basic PHP. The user submits his/her ID, the script embedded in the form page fetches that ID from the new URL formed when the submit button is pressed.
Like I said, if you'd rather not tamper with your current FHG list by trying to add the form, you don't have to. As long as you do the minor editing to each gallery and add a couple of lines to your .htaccess file (I tell you about that in the readme file) your galleries will carry the affiliate ID.